Sample Collection Instructions
Soil Samples (Undisturbed Soil Samples)
Collection of undisturbed samples is highly recommended because this preserves the native bulk density (unit weight), and thermal resistivity is highly dependent on bulk density.
1. A standard 3” diameter Shelby tube or equivalent sleeve-lined sampler is the recommended sampling technique
2. Be sure to collect the sample at the depth of interest (generally the depth of underground cable or duct bank installation).
3. Cleanly cut at least 6” length of Shelby tube or sampler liner with intact sample inside.
4. Cap both ends of sample to prevent loosening and evaporation.
5. Clearly label sample with relevant information that should be reflected in the report (job number or title, borehole number, depth, date, etc.)
6. See sample Shipping Instructions below
Soil or Backfill Samples (Disturbed Soil)
1. Seal 2-3 liters of sample material in doubled waterproof bags or containers to prevent evaporation.
2. Provide the please provide dry density* (dry unit weight) that sample should be remolded to before testing.
*This is often the Maximum Dry Density (MDD) from a Proctor test X the percent compaction specified for construction.
Alternatively, disturbed or backfill samples can be remolded to the desired target density in rigid containers, capped, and shipped for testing.
3. Clearly label sample with relevant information that should be reflected in the report (job number or title, backfill origin, depth, date, etc.).
4. See sample shipping instructions below.
Concrete/FTB/Grout Samples
CONTACT BASALT RIDGE FOR PILOT PINS BEFORE POURING SAMPLES! We will promptly send you pilot pins.
Prepare 3 samples from each mix and insert 1 pilot pin into the center of each.
Pilot pins should be coated with petroleum grease and inserted into the uncured sample shortly after pouring. Please insert the full length of the pilot pin, but do not bury the head.
Pilot pins can be inserted through a thin sheet of plastic wrap or the mold lid to prevent the pin from sinking into the uncured mix.
Please cap and tape the sample molds to prevent evaporation.
Samples can be shipped after 24 - 36 hours of curing period.
Clearly label sample with relevant information that should be reflected in the report (job number or title, mix number or description, date of pour, etc.)
Samples should be securely wrapped to prevent damage during shipping.
Include completed Sample Information Sheet with the samples.
Fluid Samples
Fluid Samples should be shipped in leak-proof containers with adequate packaging to prevent container breakage.
At least 100mL of sample volume is required for testing.
SHIPPING INSTRUCTIONS
Email sales@basaltridgetesting.com with the following information:
Number of Samples
Nature of sample (concrete, soil, fluid, etc.)
Expedite request (optional)
Any other relevant information
Include completed forms:
Signed Thermal Service Request Form
And any desired Chain of Custody documentation with samples
>Ship all samples in sturdy container or bucket to:
Basalt Ridge Testing Laboratory
292 Warren Rd
Pullman, WA 99163
USA